以下程序的输出结果是:Is = [12,44,23 ,46]for i in ls:if i == '44':print( 'found it ! i = ',i)breakelse:print( 'not found it···')}
A. not found it ···
B. found it ! i= 44
C. found it ! i = 44not found it ···
D. found it ! i= '44'not found it ···
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以下语句不会引发异常的是:
A. a=b=3+1j
B. 1 +"1"
C. 3/ 0
D. print " no error"
以下程序输出的图形是:for i in range(-3,4):if i < 0:print(' '*(-i)+'*'*(4+i))elif i > 0 :print(' '*3+'*'*(4+i))else:print('* '*7)
A. * * * * * * * * * * * * * * * * * * *
B.
*
* *
* * *
* * * * * * *
* *
*
C. *
* * * * * * * * * * * * * * * * * * * * * * * *
D. * * * * * * * * * * * * *
实验中量取5mL溶液,用下列哪种仪器量取准确度最高?
A. 移液管
B. 刻度吸量管
C. 奥式吸量管
D. 量筒
E. 锥形瓶
实验中需要量取0.45ml溶液,选择下列哪种规格的刻度吸量管最合适?
A. 1ml
B. 2ml
C. 5ml
D. 0.5ml